Where would you hear the complaints ? Reddit censors negative comments, twitter is bots and noise... One out of every thousand small amount double spend is millions of dollars in the aggregate on a long enough timeline, but not individually painful enough to alert anyone.

You cannot prove to me that this is not happening, not even in a round about way through inference the way moneroinflation .com can show inflation is not taking place.

That is all the evidence i need to make my case that this is an issue.

With Bitcoin, ( or more accurately public ledger blockchains, i'm not shilling Bitcoin vs Monero) anyone can know where and when even dust is lost.